Furnace for burning comminuted material.



7 No. 820,932. Y BATENTBD MAY 15, 1906.

, H. K. KRIEBEL. EUBNAGE FOR BURNING COMMINUTED MATERIAL.

APPLICATION FILED 1320.29, 1904 /VVEN fC. Saum/aww. www

urn r HOSEA K. IRIIBEL, OF PHILADELPHIA, PENNSYLVANIA. FUHNGIE FUR BUWNHNGM COWIMINUTIED TEIRIAL.. l

Specification of Letters Patent.

.Patented May 15, 1906.

Application filed December 29,1904. Serial No. 238,75 7.

To all 21,171,079?, it 71mg/ concern.:

Be it known that I, HosEA K. KRIEBEL, a citizen ofthe United States, residing in the city of Philadelphia, in the county of Philadelphia and State of Pennsylvania, have invented certain new and useful Improvements in Furnaces for Burning Comminuted Materials, whereof the following is a specification.

It is one object of the present invention to provide a combined furnace and boiler for generating a high percentage of power by eX- posing to the heated products of combustion a great amount of heating-surface.

Another object is to provide such a furnace with means for burning comminuted materials to attain these ends.

Other objects will appear hereinafter.

The invention consists of the improvements hereinafter described and finally claimed.

The nature, characteristic features, and scope of the invention will be more fully understood from the following description, taken in connection with. the accompanying drawings, forming p art hereof, and in which- Figure l is a sectional view of the combined boiler and furnace. Fig. 2 is a sectional view taken on theline 2 2 of Fig. l and Figs. 3, 4, and 5 are sectional views illustrating a modified form of the invention.

The furnace may be constructed' of any suitable material such as is well known in the manufacture .of such apparatus.

In the drawings, c is a fire-brick structure, which may be inclosed in a metallic shell l). Surrounding this is a similar shell c. Located at the top of the furnace there is shown a sectional boiler d, although the style of the boiler is immaterial tothe invention. EX- tending downwardly fromv the boiler and partially encircling the furnace proper are a series of water chambers or compartments e.

e is a compartment arranged at right angles to the chamber e and forming a connection therefor.

f is a fire-grate, and g designates a series of the water-pipes i surface of the apparatus, although the pipes may be omitte ,if desired. At the front of the furnace and hinged thereto are means of obtaining access to the furnace. They are provided with air-compartments y' `md baffleplates jz and suitable ventilatorsy or draftdoors r, having communicatin with the furnace by means of ports or openings l. It will be seen by reference to Fig. 2 that these openings are arranged immediately above the 4shelves or supports and also above the grate-bars.

In practice it has been demonstrated that 'the draft produced by the arrangement is all that is necessary to the successful o eration of the furrace and does away witi forced drafts and drafts operating throughy the bottom of the furnace. The above-described apparatus is calculated Vto burn materials such as culm, peat, coal-screenings, &c., and a' description will now be given of themanner of burning the same. The fire is started upon the grate-bars, and when the shelf immediately above the said bars has become sufficiently heated to ignite the materials to be burned the same are introduced throu h the door opposite to said shelf, and when t e shelf above has in turn become duly heated the operation is repeated, and so on until the entire furnace is in operation.

In practice it has been shown that a long interval (approximately twenty-four hours) elapses before the furnace will need attentionv other than, perhaps, regulating of the air ports through the parts-lf. After this long run of,

the furnace the ashes on the shelf ,immediately above the Grate-bars are raked orl pushed into the asili-pit and the contents of the shelf immediately above are raked ont/o,

tied, and so on upward unf the shelf thus em til the top shelf is reached, when a new charge of material is introduced to said shelf.

In the modified forms shown in Fivs. 2, 3, and 4 the fire-brick shelves instead of being arched, as in Fig. 1, are shown, as being straight across the furnace and having embedded thereina series of pipes j', having communication with the water-chambers c.

for increasing the heating- A ICO As shown in Fig. 4, the ends of the pipes or tubes are bent in opposite directions, as at j, to facilitate circulation.

The above-described type of combined furnace and boiler heating-surfacesexposed tothe products of isat once economical as 'Well as efficient, andthe great amount of .of eflieiency. This together `evilr 1 the fact that there is lilile or no smok'e given off from the exhaust. due to the fact that the llames {iart of the same, and iat there is comparaleft in the pit. makes the g Tlu consume the greater also for-the reason t tively little ashes apparatus commercially im iorant. furnace ma)v either he used im' generating I heat or power. i 1t will he obvious to those. skilled in the art l to which the invention appertaius that modifioations may he made in details without deartinT from the spirit thereof. llence the invention is not limited furtherthan the prior l state of the. art. ma v require.

Havin thus described the nature and ohl l combustion insures an increased percentage I jects of t- 1e invention, what l claim as new, and desire to secure hv Letters l-ateut, 1s

A furnace or burning eonuunuted materials provided with a series of superposed comnninicating hearths that overlap to form a tortuous flue. a hoiler. Watencompartnient-s almost wholly surrounding the furnace, laterally-arranged connnunieating means for l procuring a circnlafion of water across the urnace, means located beneath the lower hearth for heating ine saine to 1n1tiallv startthe furnace and means opposite the hearths for introducing;r the materials to he burned provided with doors equipped with ports for the admission of air arranged above the level of the respective hearths. Substantially as ascribed.

lnV testimony whereof I have hereunto set my hand and seal HOSEA li. KRIEBEL. [n s.l Witnesses z' WARREN F. Maarn?,

Wj. Jamison'. 

